$ git clone -n https://github.com/xcp-ng-rpms/broadcom-bnxt-en.git /var/lib/mock/v8.3-incoming-10334-28862/root/chroot_tmpdir/scmroot/broadcom-bnxt-en
Cloning into '/var/lib/mock/v8.3-incoming-10334-28862/root/chroot_tmpdir/scmroot/broadcom-bnxt-en'...
$ git fetch origin 1c0f317fbf52da2b6914ba4df81f890a9ca2ca9c:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/broadcom-bnxt-en
 * [new ref]         1c0f317fbf52da2b6914ba4df81f890a9ca2ca9c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c0f317 Merge branch 'XS-8.3' into 8.3-import_broadcom-bnxt-en-1.10.3_237.1.20.0-8.1.xs8.src.rpm